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Air Toxicology and Epidemiology

Proposed Revisions to the Technical Support Document for Exposure Assessment and Stochastic Analysis
[12/16/11]

The public comment period on  the updated draft of the Air Toxics Hot Spots Program Technical Support Document For Exposure Assessment and Stochastic Analysis has been extended to January 13, 2012.
[01/06/12]

OEHHA is announcing Public Workshops on the updated draft of the Air Toxics Hot Spots Program Technical Support Document For Exposure Assessment and Stochastic Analysis.

Public workshops will be held at 10:00 a.m. – 2.00 p.m. on December 20, 2011 in Diamond Bar and 10:30 a.m. – 2.30 p.m. on December 22, 2011 in Oakland.  Location information is as follows:

Meeting Locations

Room  CC2 South Coast Air Quality Management District 21865 Copley Dr, Diamond Bar, CA 91765	Room 7, Elihu Harris Building 1515 Clay St., 2nd Floor Oakland, CA 94612

The Office of Environmental Health Hazard Assessment (OEHHA) has released an updated draft of the document, Air Toxics Hot Spots Program Technical Support Document For Exposure Assessment and Stochastic Analysis, to solicit public comment on the revised portions of the document.  OEHHA is required to develop guidelines for conducting health risk assessments under the Air Toxics Hot Spots Program (Health and Safety Code Section 44360 (b) (2)).  OEHHA previously developed Technical Support Documents (TSDs) in response to this statutory requirement, including one in 2000 for exposure assessment.  This revised draft TSD is designed to replace the original TSD, and reflects new scientific knowledge developed since the previous guidelines were prepared.  We have updated exposure parameters (e.g., inhalation rate, food consumption rate, etc.) based on the most recent data, including exposure factors for infants and children in accordance with the mandate of the Children’s Environmental Health Protection Act (Senate Bill 25, Escutia, Chapter 731, Statutes of 1999, Health and Safety Code Sections 39669.5 et seq.). 

OEHHA will solicit public comment at the workshop, but we encourage participants to also submit their comments in writing before the close of the public comment period on January 6th, 2012. The public comment period on  the updated draft of the Air Toxics Hot Spots Program Technical Support Document For Exposure Assessment and Stochastic Analysis has been extended to January 13, 2012.

Comments may be submitted to:
Robert Blaisdell, Ph.D., Chief
Exposure Modeling Section
Office of Environmental Health Hazard Assessment
1515 Clay St, 16th Floor
Oakland, CA 94612
robert.blaisdell@oehha.ca.gov